Cells that have a nucleus are referred to as ________ cells; those that lack a membrane-bound nucleus are called ________ cells
Fill in the blank(s) with correct word
eukaryotic; prokaryotic
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The umbilical cord functions to
(a) carry waste products in the blood from the fetus to the mother. (b) carry waste products in the blood from the mother to the fetus. (c) carry oxygen in the blood from the mother to the fetus. (d) do both a and c.
Which element's isotope is commonly used to determine when biological samples such as fossils, were formed?
A. oxygen B. hydrogen C. carbon D. nitrogen E. sulfur
Sea turtles lay their eggs in the sand on the beach. When the sea turtle eggs hatch, the babies migrate to the water without any assistance from the parent. This behavior, in which they are born with, is known as
A. All of the answer choices are correct. B. behavior learned by observation. C. innate behavior. D. learned behavior. E. habituation.
Which kind of chemical reaction involves the attachment or removal of a phosphate group?
A. oxidation-reduction B. acid phosphorylation C. phosphorylation D. hydrolysis